An inclusive study on the phylogenic evolution of the Drosophila virilis section (Diptera: Drosophilidae)

2016 Fiscal Year Final Research Report

• Project/Area Number: 26440203
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Biodiversity/Systematics
• Research Institution: Hokkaido University of Education
• Principal Investigator: WATABE Hideaki 北海道教育大学, 大学院教育学研究科, 教授 (10167190)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: ショウジョウバエ / 系統進化 / 適応放散 / 地理的分布 / 東アジア / 南西中国 / 染色体核型

Outline of Final Research Achievements

The Drosophila virilis section is widely distributed in the Northern Hemisphere, and the author has made extensive field studies in continuous greenbelts from Southeast Asia to East Siberia, throughout the Japanese Islands. Japan possesses all species groups of the virilis section, and keeps a high biodiversity of this taxonomic group. Japan was the migration route for the species, which had diversified in North America. The northern-most border of tropical members lies in the Watase Line of the zoogeography between Amami and Yakushima, and that of a warm temperate member of the robusta group does in the Blackiston Line in the Tsugaru Straight. Karyotypes of tropic D. angor and D. fluvialis were examined, and both species had the acrocentric X chromosome. This result supports their phylogenetic positions inferred from the molecular data.

Free Research Field

生物学